Flat Panel 15" iMac no power

Over its lifetime it has sometimes been a bit 'flakey' with power issues. Over the years I would sometimes unplug the power lead from the wall in case of power surges etc. Sometimes it wouldn't respond immediately when I plugged it back in. I found that if I connected it to an extension cord or into a powerpoint that had just been used then it would power up. Sounds weird but true. I was a little concerned so I took it to my local Applecentre under warranty and it wouldn't repeat the problem for them!

A few days ago it was unplugged from the back of the computer and not the wall — something it hasn't always responded to that well. But now it won't power up at all. Zip.

I've tried (1) resetting the PMU (2) using a friend's power cord but with no success.

I've looked at a flat panel repair manual. I think the next thing I'll try is replacing the internal battery.

I'm happy for you. I'd really suggest buying a power surge protector. I bought one in 2006 for my original Sony Vaio and I'm still using it today with my beautiful Macs! Last year in August Perth had a very bad storm. Lightening struck my house and it burnt out every appliance plugged into a wall socket.. Accept for my iMac, macbook pro, Macbook air and Macbook. They were all attached to a power surge protector. I was honestly amazed. I have bought many things in my life, but that surge protector is one of my favourites..

I'm happy for you. I'd really suggest buying a power surge protector. I bought one in 2006 for my original Sony Vaio and I'm still using it today with my beautiful Macs! Last year in August Perth had a very bad storm. Lightening struck my house and it burnt out every appliance plugged into a wall socket.. Accept for my iMac, macbook pro, Macbook air and Macbook. They were all attached to a power surge protector. I was honestly amazed. I have bought many things in my life, but that surge protector is one of my favourites..